Portable door lock and alarm.



No. 655,523. Patented Aug. 7, |900. A. L.- SHURE.

PORTABLE DOOR LOCK AND ALARM` (Appne'azion mea Apr. 21, 1900.) (NoModel.)

NiTn STATES PATENT Orar 11;;

ANTHONY L. SHORE, OF MINNEAPOLIS, MINNESOTA.

PORTABLE DOOR LOCK AND ALARM.

SPECIFICATION forming part of Letters Patent No. 655,523, dated August7, 1900. Application lecl April 21,1900. Serial No. 113,726. (No model.)

To all whom, t may concern.-

Be it known that l, ANTHONY L. SHORE, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements in PortableDoor Locks and Alarms; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enablevothers skilled in the art to which it appertains to make and use thesame.

My present invention has for its object to provide an improved portabledoor-lock especially adapted for use by traveling rnen and tourists orother persons who are obliged to travel from place to place, the deviceserving to secure the doors of their rooms in such manner that theycannot be opened by the manipulation of the ordinary door-lock.

To the above ends the inventionconsists of the novel devices andcombinations of devices hereinafter described, and defined in theclaims.

This invention relates yto the same class of door-locks or door-securingdevices set forth in my pending application, Serial No. 6,677, iiledFebruary 27, 1900.

The present invention is illustrated in the accompanying drawings,wherein like characters indicate like parts throughout both Views.

Figure l is a horizontal section through a portion of a door and adoor-frame, showing my improved lock applied in working positionthereto; and Fig. 2 is a similar view but illustrating diiferentpositions of the parts.

The numeral l indicates a portion of an ordinary door, and the numeral 2indicates a portion of an ordinary door -frame having the door-stopstrip 3, against which the door closes in the ordinary manner. In theconstruction illustrated in Fig. l the door-frame is also shown asprovided with casings 4 5, while in the construction illustrated in Fig.2 the inner side of the door-frame is shown as extending flush with theinner surface of the door l. In both views the numeral 0 indicates anordinary latch-plate, having one or more passages 7for the latch or lockbolt, the door-frame being recessed at 8 in line with the saidperforation 7.

Of the parts of the portable lock the character c indicates ascrew-threaded stem ,which terminates at its inner end in a flattenedsection d', having a laterally-projecting detent or lug a2. Theflattened portion ed is adapted to extend between the latch-plate 7 andthe adjacent free portion of the door 1, and the detent d2 is adapted tobe inserted through the perforation 7 and into the recess 8. The saiddetent must of course be so applied while the door is swung open. Thenthe door is swung closed, the device is secured in position.

The character b indicates a reversible angle bracket or plate, which isperforated, as shown at b', and is provided with a foot or bent portionb2. In applying the device to a door which stands offset from its frameor from the casing thereof, as shown in Fig. l, the foot b2, of thebracket b is turned inward for contact with the door, as shown in saidFig. l. Where the casingis not provided or where the door and its frameextend flush at the inner side, the bracket h is applied, as shown inFig. 2, with its foot b2 turned outward.

Outward of the bracket h a securing head or knob is screwed onto thestem a and applied to clamp the angle-bracket b in working position. J y

An alarm device in connection with the above lock is desirable, andhence I employ a small bell o of the type used as bicyclebells, and thisis detachably applied to the stem ct, being screwed onto the said stem.For an important purpose a coiled springf is applied between the bracketb and the knob or bell c, it being understood that the said bell is thusemployed to serve the double function of an alarm and a stop. To actuatethe bell automatically when an attempt is made to open the door, a smallbell-crank lever gis shown as pivoted to one section of the bell, onearm thereof being connected by a short link g to the bell-actuatinglever f. The other arm g2 of the said bell-crank is so set that itnormally engages or stands very close to the outer surface of thebracket or plate b, either as shown in Fig. l or as shown in Fig. 2. Tolock the bell c in the position in which it is adjusted, a thumb-nut 7cis preferably applied to the stem a, the saine being normally screwedagainst the said bell, a shown in the drawings.

'scope of my invention. -alarmffeature is'not desired an ordinary knob`the door may take various forms. might be placed directly against or incontact It is important to here note thatrthe foot b2 of the angle plateor'bracket b stands at such distance from the perforation b that whenthe said bracket is turned with its foot outward, as shown in Fig. 2,either the said bell or the thumb-nut Zt, according towhich may beapplied inward, clears or'passes free ofthe 'said outturned footportion. These relative dimensions are necessary in order to permit thesaid bracket I) to be reversed.

The action will be substantially as follows:

With the device appliedeither as Yshown ini Fig. l or as shown in Fig. 2the door may be moved slightly inward, and this movement is sufcient tocause the bracket l) to engage and:move-the bell-crank g2, therebyimparting -movemenbto the bell-actuatingleverl f',

withrthe' result that the bell-will be rung and @an alarm given.However, bnt-slightfmovement of the Vdoorispe-rmitted, for the-reasonthat' the spring j' is capable of-but little comkpressiomand whencompressed toits limit becomes a rigid intermediate stop andprevents-further opening movement of the door.

The device/above described is ofv con rse capable of considerablemodification withinpthe For instance,f`if.the

orfnnt-may be substituted forthe bell. It

-will-a-lso'be-understood that'even if-the bell be provided fthe-connections for actuating lthe-same bythe initial openingV movement ofThe bell aviththe angle-plate'b, andlthefspring might be-'placed'betweenlthe bell and the'thumbninth, inwhich case `bythe-initialopening Vmovementof the doorthe bell-crank g-g2 pressed to -its limit,-substantiallyas described.

2. The combination with the screw-threaded stem a flattened at a andprovided with the detent-lug a2, of the reversible anglebracket Z2,- bz,thebellcvadjustablylseclurable on `said stem a;thespring-f-betweensaidbell land said bracket bfand'-thefbellJcrankleverg connectedf'to the belllleverffandactu-ating the :saidl bell undertheinitial'openiirginove- `ment of Ithe door, the said vparts operatingsubstantially as described.

'3. The combinationlwithf the detentlsecun able lbetween the free edgeof door-audits frame, of a bell, a nut land -faspringonl-the saidstem,said spring fperniittin-g -fa limited opening movement-of thedoor-ran'dithen: acting' as astop, and bell-actuating connectionsoperate'diby the initialf` openingmovernent olf l the door,isubstantiallywas described.

In testimonywhereof iI V-attix' my signature inlpresence oftwowitnesses.

Witnesses:

v-MABEL M. MCGEARY, F. D. MERCHANT.

